US9009979B2 - Folding blade knife with a system for locking the blade in an unfolding position - Google Patents

Folding blade knife with a system for locking the blade in an unfolding position Download PDF

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Publication number
US9009979B2
US9009979B2 US13/765,092 US201313765092A US9009979B2 US 9009979 B2 US9009979 B2 US 9009979B2 US 201313765092 A US201313765092 A US 201313765092A US 9009979 B2 US9009979 B2 US 9009979B2
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Prior art keywords
blade
component
locking
knife
handle
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Expired - Fee Related, expires
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US13/765,092
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US20130212887A1 (en
Inventor
Edouard De Buyer-Mimeure
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WILDSTEER
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WILDSTEER
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Publication of US20130212887A1 publication Critical patent/US20130212887A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/02—Hand knives with adjustable blade; Pocket knives with pivoted blade
    • B26B1/04—Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/02—Hand knives with adjustable blade; Pocket knives with pivoted blade
    • B26B1/04—Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position
    • B26B1/042—Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position by a spring biased locking lever pivoting around an axis parallel to the pivot axis of the blade

Definitions

  • This invention relates to the technical field of cutlery instruments and in particular to the technical field of folding blade knives.
  • the invention relates more specifically to a system for blade locking in the unfolded position for a folding blade knife.
  • the invention can be used to particular advantage in the field of so-called “outdoor” knives, survival knives and tactical knives.
  • a first technique comprises for example a blade locking system using friction, wherein it is only the friction of the blade against the plates of the handle-forming part which locks the knife blade in the unfolded position.
  • a pivot screw is used for the blade and it is then possible to tighten the pin to adjust the required friction. This technique is not entirely satisfactory, and blade locking is not optimum.
  • a second technique comprises hooking the upper part of the blade heel by a metal rod inserted between the plates, in the upper part.
  • the blade is thus fully locked.
  • it is necessary to actuate a spring placed on the back or at the back of the handle, which releases the locking rod.
  • This technique is entirely satisfactory in terms of locking but does however afford some risk of accidental unlocking when the knife handle has to be grasped firmly.
  • the aim of the invention is therefore to overcome the aforementioned drawbacks and thereby offer an alternative to these locking systems which is entirely satisfactory to the user thereof in terms of locking efficiency and elimination of any risk of accidental unlocking.
  • Another aim of the invention is in particular to provide a system for blade locking in the unfolded position that is reversible so that it can be mounted both on a knife for a left-handed user and on a knife for a right-handed user.
  • a further aim is also to provide a guard to protect the hand of a person using a knife fitted with a system for blade locking in the unfolded position according to the invention.
  • the aim is to provide an optimum system for blade locking in the unfolded position for folding blade knives.
  • a system has thus been perfected for blade locking in the unfolded position, for a folding blade knife comprising a handle for a user to grasp the knife, and a blade pivotably mounted relative to this handle, the blade being pivotable between an unfolded position for use and a foldaway position for storage, wherein the blade is partially concealed in the handle.
  • the system of blade locking in the unfolded position comprises:
  • the system for blade locking in the unfolded position comprises third locking means capable of cooperating with said second locking means and adopting a first position of locking said second locking means in the first locking position, and a second release position.
  • the third locking means is capable of cooperating with the second locking means so that when said third locking means moves from the second release position to the first locking position, said second and first locking means move successively from the second release position to the first locking position.
  • this feature gives the user the opportunity to perform the knife blade locking and unlocking operation in a single action and using just one hand.
  • said first locking means comes in the form of a leaf spring comprising a recess capable of cooperating, when said leaf spring is in the first locking position, with a finger provided on the upper part of the blade heel, the upper part of the blade heel being the part opposite the cutting edge of the blade.
  • the second locking means comes in the form of a first component pivotably mounted on the handle, said first component comprising a hook capable of cooperating, when said first component is in the first locking position, with a lug provided on said first locking means, in order to lock said first locking means in the first blade locking position, and, said first component comprises an eccentric part capable of cooperating, when said first component is in the second release position, with said first locking means so as to force them to adopt the second blade release position, the first component comprises a lever so that, by action on said lever, the first component can move into the first or second position.
  • the lever of the second locking means constitutes, when they are in the first locking position, a guard for the protection of the user's hand.
  • the third locking means comes in the form of a second component pivotably mounted on the handle, the second component comprising an abutment capable of cooperating, when said second component is in the first locking position, so as to prevent the rotation of said first component, said second component comprises a lever so that, by action on said lever, the second component can move into the first or second position.
  • the first component comprises a boss for snapping on the second component.
  • the first locking means is reversible in position and the second and third locking means are capable of being mounted on one side or the other of the handle.
  • system for blade locking in the unfolded position can be adapted for use both on a knife designed for a left-handed user and on a knife designed for a right-handed user.
  • the system for blade locking in the unfolded position is mounted on a knife of the so-called “outdoor” type, e.g., a survival knife or a tactical knife.
  • FIG. 1 is a perspective diagrammatic representation showing the inventive system for blade locking in the unfolded position mounted on a folding blade knife, the blade being in the unfolded position for use and the three locking means are in the first locking position;
  • FIG. 2 is a diagrammatic front view representation showing the blade of the knife shown in FIG. 1 ;
  • FIG. 3 is a diagrammatic front view representation showing the first locking means of the system for blade locking in the unfolded position according to the invention
  • FIG. 4 is a diagrammatic front view representation showing the central core of the knife shown in FIG. 1 ;
  • FIG. 5 is a diagrammatic front view representation showing one of the two plates of the handle of the knife shown in FIG. 1 , the two plates being identical;
  • FIG. 6 is a diagrammatic front view representation showing the second locking means of the system for blade locking in the unfolded position according to the invention
  • FIG. 7 is a diagrammatic front view representation showing the third locking means of the system for blade locking in the unfolded position according to the invention.
  • FIG. 8 is a diagrammatic front view representation of the knife shown in FIG. 1 , the blade being partially folded and the first, second and third locking means being in the second release position;
  • FIG. 9 is a diagrammatic representation similar to the one in FIG. 8 , the blade being in the unfolded position for use and the first, second and third locking means being in the second release position;
  • FIG. 10 is a diagrammatic representation similar to the one in FIG. 9 , the first and second locking means being in the first locking position and the third locking means being in the second release position;
  • FIG. 11 is a diagrammatic representation similar to the one in FIG. 10 , the first, second and third locking means being in the first locking position;
  • FIGS. 12 and 13 are diagrammatic representations seen from above of the knife shown in FIG. 1 , the blade locking means being provided on the right and on the left of the knife respectively, these figures showing the reversibility of said locking means.
  • FIGS. 1 to 13 show a preferred embodiment of the system for locking ( 1 ) a blade ( 4 ) according to the invention, mounted on a folding blade knife ( 2 ), comprising a handle ( 3 ) for a user to grasp the knife ( 2 ), and a blade ( 4 ) pivotably mounted relative to this handle-forming part ( 3 ).
  • the blade ( 4 ) is capable of pivoting so as to adopt either a first foldaway position for storage, in which it is partially concealed in said handle ( 3 ), or a second unfolded position for use.
  • the handle ( 3 ) is constituted by a component forming a central core ( 5 ), covered by two plates ( 6 ) of shapes that are ergonomic for the user's hand.
  • the two plates ( 6 ) are preferably identical.
  • the blade ( 4 ) is pivotably mounted about a pin ( 7 ) passing through the heel ( 4 a ) of said blade ( 4 ) and the end part of the two plates ( 6 ).
  • the blade ( 4 ) is therefore capable of adopting two positions, a first foldaway storage position, wherein the blade ( 4 ) is abutted against the central-core-forming part ( 5 ) and partially concealed in the handle ( 3 ), between the two plates ( 6 ), and a second unfolded position for use, wherein the blade ( 4 ) is fully unfolded, in alignment with the handle ( 3 ) and abutted against the central-core-forming part ( 5 ).
  • the system for locking ( 1 ) a blade ( 4 ) comprises first locking means that comes in the form of a leaf spring ( 8 ), provided on the top of the knife ( 2 ), in contact with the sections of the two plates ( 6 ) and secured to the central-core forming part ( 5 ).
  • This leaf spring ( 8 ) is capable of adopting two positions, a first position of locking the blade ( 4 ) in the unfolded position and a second position of release of said blade ( 4 ).
  • the leaf spring ( 8 ) comprises at its end opposite the blade ( 4 ), a recess ( 8 a ) capable of cooperating with a finger ( 9 ) provided on the upper part of the heel ( 4 a ) of the blade ( 4 ), opposite the leaf spring ( 8 ).
  • the finger ( 9 ) provided on the upper part of the heel ( 4 a ) of the blade ( 4 ) penetrates the recess ( 8 a ) formed in the leaf spring ( 8 ).
  • the effect of this is to hook the leaf spring ( 8 ) on the heel ( 4 a ) of the blade ( 4 ) of the knife ( 2 ) and to lock said blade ( 4 ) in the unfolded position.
  • the system for locking ( 1 ) a blade ( 4 ) further comprises second locking means capable of adopting two positions, a first position of locking said first locking means in the first position of locking the blade ( 4 ) in the unfolded position, and a second release position, wherein said second locking means forces said first locking means to adopt the second release position of the blade ( 4 ).
  • the second locking means comes in the form of a first component ( 10 ) pivotably mounted about a pin ( 10 a ) passing through both said first component ( 10 ) and the end part of the two plates ( 6 ) of the handle ( 3 ).
  • Said first component ( 10 ) comprises a hook ( 10 b ) produced in particular by the provision of a notch ( 10 c ) in the material of said first component ( 10 ).
  • This notch ( 10 c ) is capable of cooperating, after said first component ( 10 ) has pivoted to a first locking position, with a lug ( 8 b ) provided on the lateral part of the leaf spring ( 8 ) so as to lock it in the locking position of the blade ( 4 ) of the knife ( 2 ) in the unfolded position.
  • This first component ( 10 ) also comprises an eccentric part ( 10 d ) capable, after said first component ( 10 ) has pivoted in the reverse direction to a second release position, of lifting said leaf spring ( 8 ) and disconnecting the finger ( 9 ) of the blade ( 4 ) of the knife ( 2 ) from the recess ( 8 a ) of the leaf spring ( 8 ), in order to force said leaf spring ( 8 ) to adopt a second release position of the blade ( 4 ) of the knife ( 2 ).
  • said first component ( 10 ) comprises a part, opposite the notch, forming a lever ( 10 e ) intended to allow the user to manipulate the first component ( 10 ) and to move it from the first to the second position.
  • the lever ( 10 e ) is extended by a pre-set length so that, when said first component ( 10 ) is in the first locking position, a guard is formed to protect the user's hand.
  • said lever ( 10 e ) is extended in a direction substantially perpendicular to the direction of the general axis of the blade ( 4 ) of the knife ( 2 ).
  • the system for locking ( 1 ) a blade ( 4 ) comprises to advantage third locking means capable of adopting two positions, a first position of locking said second locking means in the first locking position, and a second release position.
  • said third locking means comes in the form of a second component ( 11 ) pivotably mounted about a pin ( 11 a ) passing through both said second component ( 11 ) and the end part of at least one of the two plates ( 6 ) of the handle ( 3 ).
  • the second component ( 11 ) comprises an abutment ( 11 b ) capable of cooperating, after said second component ( 11 ) has pivoted to the first locking position, with said first component ( 10 ) so as to prevent it from pivoting and lock said first component ( 10 ) in the first locking position.
  • the second component ( 11 ) comprises, a part, opposite to the abutment ( 11 b ), forming a lever ( 11 c ) and intended to allow the user to manipulate said second component ( 11 ) and to move it from the first to the second position.
  • the second component ( 11 ) is, to be more specific, capable of pivoting until it abuts against the eccentric part ( 10 d ) of the first component ( 10 ).
  • a boss ( 100 is formed on the first component ( 10 ), between the lever ( 10 e ) and the eccentric part ( 10 d ), so as to snap on the abutment ( 11 b ) of the second component ( 11 ) between said boss ( 100 and said lever ( 10 e ) in order to hold said second component ( 11 ) in the locking position and avoid any risk of accidental unlocking.
  • Said second component ( 11 ) also serves to lock said first component ( 10 ) in the first locking position which is also a position wherein the lever ( 10 e ) of said first component ( 10 ) forms a guard ( 12 ) for the user's hand.
  • the second component ( 11 ) serves to lock said first component ( 10 ) in the guard position. This then serves to make the guard secure against any accidental unlocking caused, for example, by an impact on said guard ( 12 ) when the knife ( 2 ) is used for strike operations.
  • the positioning of the user's hand behind the guard also reduces the risks of accidental unlocking since the hand serves to keep the guard in position and, therefore, to keep the first component ( 10 ) in the first locking position.
  • the blade ( 4 ) comprises in the lower part of its heel, intended to be concealed between the two plates ( 6 ), a hook ( 13 ).
  • This hook ( 13 ) is capable of cooperating with a projection (not shown) provided on one of the two plates ( 6 ) and internally overlapping.
  • the projection-forming element is provided on the wall of one of the two plates ( 6 ), between said two plates ( 6 ).
  • the projection provided between the two plates ( 6 ) may be implemented by a spring secured at one end to one of the inner walls of one of the plates ( 6 ) and fitted at the other end with a bead capable of cooperating with the hook-forming part ( 13 ) of the blade ( 4 ) of the knife ( 2 ).
  • the blade ( 4 ) of the knife ( 2 ) when in use, is for example, initially folded away and snapped in between the two plates ( 6 ) of the handle ( 3 ). The user must therefore exert sufficient force on the blade ( 4 ) by pulling on it to unlatch it and move it into the unfolded position for use.
  • the blade ( 4 ) reaches abutment on the central-core-forming part ( 5 ), and the finger ( 9 ) of said blade ( 4 ) penetrates the recess ( 8 a ) provided in the leaf spring ( 8 )
  • the user pivots the first component ( 10 ) by means of the lever ( 10 e ) of said first component ( 10 ) in order to move the first component into the first locking position of the leaf spring ( 8 ).
  • the blade ( 4 ) of the knife ( 2 ) is thus locked in position optimally and any accidental unlocking is eliminated.
  • the configuration of the pivoting first and second components ( 10 , 11 ) acting as the second and third locking means, respectively, allows the user to perform the operations of locking and unlocking the blade ( 4 ) of the knife ( 2 ) in a single action. Indeed, by acting solely on the second component ( 11 ) and causing the second component ( 11 ) to pivot in order to move the second component ( 11 ) into the first locking position, it automatically moves the pivotable first component ( 10 ) into the first locking position.
  • the operations to lock and unlock the second and third locking means may be performed one-handed.
  • the first locking means is reversible in position and the second and third locking means is capable of being mounted on one side or the other of the handle-forming part ( 3 ).
  • the system for locking ( 1 ) a blade ( 4 ) in the unfolded position is reversible and may be mounted both on a knife ( 2 ) for a left-handed user and on a knife ( 2 ) for a right-handed user.
  • the invention thus provides a system for blade locking in the unfolded position for a knife ( 2 ) with a folding blade ( 4 ) wherein the locking of the blade ( 4 ) in the unfolded position is optimum.
  • the inventive locking system ( 1 ) has the advantage of being reversible so that it can be mounted both on a knife ( 2 ) for a left-handed user and on a knife ( 2 ) for a right-handed user.
  • the inventive locking system also provides a guard for protecting the user's hand and is of straightforward, safe and rational design.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
US13/765,092 2012-02-21 2013-02-12 Folding blade knife with a system for locking the blade in an unfolding position Expired - Fee Related US9009979B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1251562 2012-02-21
FR1251562A FR2986986B1 (fr) 2012-02-21 2012-02-21 Systeme de verrouillage de lame en position depliee pour couteau a lame repliable

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US20130212887A1 US20130212887A1 (en) 2013-08-22
US9009979B2 true US9009979B2 (en) 2015-04-21

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US13/765,092 Expired - Fee Related US9009979B2 (en) 2012-02-21 2013-02-12 Folding blade knife with a system for locking the blade in an unfolding position

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US (1) US9009979B2 (fr)
EP (1) EP2631044B1 (fr)
FR (1) FR2986986B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110289783A1 (en) * 2010-06-01 2011-12-01 Erika Polyakova Apparatus and method for providing a hand-held instrument with at least one selectively operable retractable protective element
US20140115899A1 (en) * 2012-10-29 2014-05-01 Spencer Frazer Folding knife with mechanism to reposition back bar
US20140338198A1 (en) * 2013-03-15 2014-11-20 Spencer Frazer Knife opening mechanism
USD843807S1 (en) 2016-06-03 2019-03-26 Browning Folding knife

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM517672U (zh) * 2015-11-18 2016-02-21 zhi-cheng Gao 具保險機制之背卡式折合刀
US10953556B2 (en) * 2018-08-10 2021-03-23 William R. Tuch Switchblades
JP6697624B1 (ja) 2019-11-12 2020-05-20 純平 間狩 折り畳み式ナイフ

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1373993A (en) * 1920-02-26 1921-04-05 Edwin A Halseth Knife
US4563813A (en) * 1984-04-09 1986-01-14 Fortenberry Charles K Cam lock knife structure
FR2732637A1 (fr) 1995-04-10 1996-10-11 Cellier Christophe Couteau fermant a mousqueton verrouillable
FR2782287A1 (fr) 1998-08-14 2000-02-18 Alain Descy Dispositif de blocage ou deblocage d'un couteau pliant
US20050194238A1 (en) * 2001-08-08 2005-09-08 Spencer Frazer Folding knife
US20090193664A1 (en) 2008-02-01 2009-08-06 Kai U.S.A., Ltd., Dba Kershaw Knives Locking mechanism for a folding knife
DE202009008278U1 (de) 2009-06-10 2009-09-10 Gorski, Wilfried Klappmesser
US7600322B2 (en) * 2007-06-04 2009-10-13 Chih-Chen Kao Folding knife
US7634858B1 (en) * 2006-01-24 2009-12-22 SOG Specialty Knives & Tools, Inc. Folding knife with finger guard
US7748122B2 (en) * 2007-09-05 2010-07-06 Mentor Group, L.L.C. Knife blade opening mechanism
US7913398B2 (en) * 2008-04-29 2011-03-29 Li-Pen Chu Folding knife with an unlocking mechanism
US20130047439A1 (en) * 2011-08-29 2013-02-28 Buck Knives, Inc. Lock for a flip open knife, and mechanism for making same automatic
US8832943B2 (en) * 2012-06-26 2014-09-16 Gerber Sakai Co., Ltd. Retractable scissors

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1373993A (en) * 1920-02-26 1921-04-05 Edwin A Halseth Knife
US4563813A (en) * 1984-04-09 1986-01-14 Fortenberry Charles K Cam lock knife structure
FR2732637A1 (fr) 1995-04-10 1996-10-11 Cellier Christophe Couteau fermant a mousqueton verrouillable
FR2782287A1 (fr) 1998-08-14 2000-02-18 Alain Descy Dispositif de blocage ou deblocage d'un couteau pliant
US20050194238A1 (en) * 2001-08-08 2005-09-08 Spencer Frazer Folding knife
US7634858B1 (en) * 2006-01-24 2009-12-22 SOG Specialty Knives & Tools, Inc. Folding knife with finger guard
US7600322B2 (en) * 2007-06-04 2009-10-13 Chih-Chen Kao Folding knife
US7748122B2 (en) * 2007-09-05 2010-07-06 Mentor Group, L.L.C. Knife blade opening mechanism
US20090193664A1 (en) 2008-02-01 2009-08-06 Kai U.S.A., Ltd., Dba Kershaw Knives Locking mechanism for a folding knife
US7913398B2 (en) * 2008-04-29 2011-03-29 Li-Pen Chu Folding knife with an unlocking mechanism
DE202009008278U1 (de) 2009-06-10 2009-09-10 Gorski, Wilfried Klappmesser
US20130047439A1 (en) * 2011-08-29 2013-02-28 Buck Knives, Inc. Lock for a flip open knife, and mechanism for making same automatic
US8832943B2 (en) * 2012-06-26 2014-09-16 Gerber Sakai Co., Ltd. Retractable scissors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Search Report for priority French Application No. FR 1251562, dated Sep. 25, 2012.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110289783A1 (en) * 2010-06-01 2011-12-01 Erika Polyakova Apparatus and method for providing a hand-held instrument with at least one selectively operable retractable protective element
US20140115899A1 (en) * 2012-10-29 2014-05-01 Spencer Frazer Folding knife with mechanism to reposition back bar
US20140338198A1 (en) * 2013-03-15 2014-11-20 Spencer Frazer Knife opening mechanism
USD843807S1 (en) 2016-06-03 2019-03-26 Browning Folding knife

Also Published As

Publication number Publication date
FR2986986B1 (fr) 2014-02-21
EP2631044A1 (fr) 2013-08-28
US20130212887A1 (en) 2013-08-22
EP2631044B1 (fr) 2015-10-14
FR2986986A1 (fr) 2013-08-23

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